Got an e-mail from Toys "R" Us. All "True Heroes" toys are 25% off at the moment. Not sure how long the sale lasts, but if there's anything in that line you've been wanting to integrate into your G.I.Joe world, this wouldn't be a bad time to do so.

Found a new True Heroes item at TRU last night - looks pretty good:
https://www.toysrus.com/product?productId=EE7733FC

Didn't buy yet, but from what I could tell the back opens big enough for the ATV to go in, so hoping it could hold a squad. The driver/crew area is sparse, but def. big enough to get a couple guys in there.